What is the correct procedure for students to follow if a chemical is spilled?

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

How does photosynthesis show the conservation of mass and energy?

Por qué crees que los huevos con cáscara se llaman amnióticos?